Conus memiae (Habe & Kosuge, 1970): synonym of Conasprella memiae (Habe & Kosuge, 1970) Conus merleti Mayissian, 1974: synonym of Conus moluccensis Küster, 1838 Conus metcalfei Angas, 1877: synonym of Conus angasi Tryon, 1884 Conus metcalfii Reeve, 1843: synonym of Conus magus Linnaeus, 1758 Conus micarius Hedley, 1912: synonym of Mitromorpha micaria (Hedley, 1912) Conus mighelsi Kiener, 1847: synonym of Conus musicus Hwass in Bruguière, 1792 Conus millepunctatus Lamarck, 1822: synonym of Conus leopardus (Röding, 1798) Conus mindanus Hwass in Bruguière, 1792: synonym of Conasprella mindana (Hwass in Bruguière, 1792) Conus minimus Linnaeus, 1758 (unaccepted, Nomenclaturally invalid name, placed on the Official Index of Invalid and Rejected Specific Names in Zoology (ICZN Opinion n°753)) Conus minimus (Cossignani & Fiadeiro, 2015): synonym of Conus longilineus Röckel, Rolán & Monteiro, 1980 Conus minutus Schröter, 1803: synonym of Conus jickelii Weinkauff, 1873 Conus minutus Reeve, 1844: synonym of Conasprella pusio (Hwass in Bruguière, 1792) Conus mirmillo Crosse, 1865: synonym of Conus ferrugineus Hwass in Bruguière, 1792 Conus miser Boivin, 1864: synonym of Conus ambiguus Reeve, 1844 Conus mitraeformis Wood, 1828: synonym of Conus mitratus Hwass in Bruguière, 1792 Conus modestus G. B. Sowerby I, 1833: synonym of Conus fulmen Reeve, 1843 Conus molaerivus Dekkers, 2016: synonym of Pygmaeconus molaerivus (Dekkers, 2016) Conus monstrosus Küster, 1838: synonym of Conus araneosus [Lightfoot], 1786 Conus morroensis (Cossignani & Fiadeiro, 2014): synonym of Conus diminutus Trovão & Rolán, 1986 Conus moussoni Crosse, 1865: synonym of Conus balteatus G. B. Sowerby I, 1833 Conus moylani Delsaerdt, 2000: synonym of Conus papuensis Coomans & Moolenbeek, 1982 Conus multibandatus Bozzetti, 2017: synonym of Conus coronatus Gmelin, 1791 Conus multicatenatus G. B. Sowerby II, 1865: synonym of Conus locumtenens Blumenbach, 1791 Conus multilineatus G. B. Sowerby III, 1875: synonym of Conus furvus Reeve, 1843 Conus muscosus Lamarck, 1810: synonym of Conus caracteristicus Fischer von Waldheim, 1807 Conus musivum G. B. Sowerby I, 1833: synonym of Conus legatus Lamarck, 1810 Conus musivus Trovão, 1975: synonym of Conus alexandrinus Kaicher, 1977 Conus mutabilis Reeve, 1844: synonym of Conus hyaena Hwass in Bruguière, 1792 Conus nahoniaraensis da Motta, 1986: synonym of Conus zebra Lamarck, 1810 Conus narcissus Lamarck, 1810: synonym of Conus ermineus Born, 1778 Conus nasui Ninomiya, 1974: synonym of Conasprella eugrammata (Bartsch & Rehder, 1943) Conus nebulosus Gmelin, 1791: synonym of Conus monachus Linnaeus, 1758 Conus nebulosus Hwass in Bruguière, 1792: synonym of Conus regius Gmelin, 1791 Conus neglectus A. Adams, 1855: